<template>
  <!--  动态饼图，仪表盘，可以用来显示人数什么的-->
  <div id="dynamic-panel" style="height: 24vh; width: 100%; margin: 0 auto;"></div>
</template>

<script>
import * as echarts from 'echarts'

export default {
  name: "DynamicPanel",
  methods: {
    initEcharts() {
      let myChart = echarts.init(document.getElementById("dynamic-panel"))

      // 监听屏幕变化自动缩放图表
      window.addEventListener('resize', function () {
        myChart.resize()
      })

      let angle = 0 //角度，用来做简单的动画效果的
      let value = 55.33
      let num = 112334
      let option = {
        title: {
          text: '{a|'+ num +'}',
          x: 'center',
          y: 'center',
          textStyle: {
            rich:{
              a: {
                fontSize: 20,
                color: '#29EEF3'
              },
            }
          }
        },
        legend: {
          type: "plain",
          orient: "vertical",
          right: 0,
          top: "10%",
          align: "auto",
          data: [{
            name: '1',
            icon: "circle"
          }, {
            name: '2',
            icon: "circle"
          }, {
            name: '3',
            icon: "circle"
          }, {
            name: '4',
            icon: "circle"
          }],
          textStyle: {
            color: "white",
            fontSize: 16,
            padding: [10, 1, 10, 0]
          },
          selectedMode:false
        },
        series: [ {
          name: "ring5",
          type: 'custom',
          coordinateSystem: "none",
          renderItem: function(params, api) {
            return {
              type: 'arc',
              shape: {
                cx: api.getWidth() / 2,
                cy: api.getHeight() / 2,
                r: Math.min(api.getWidth(), api.getHeight()) / 2 * 0.6,
                startAngle: (angle) * Math.PI / 180,
                endAngle: (90+angle) * Math.PI / 180
              },
              style: {
                stroke: "#0CD3DB",
                fill: "transparent",
                lineWidth: 1.5
              },
              silent: true
            };
          },
          data: [0]
        }, {
          name: "ring5",
          type: 'custom',
          coordinateSystem: "none",
          renderItem: function(params, api) {
            return {
              type: 'arc',
              shape: {
                cx: api.getWidth() / 2,
                cy: api.getHeight() / 2,
                r: Math.min(api.getWidth(), api.getHeight()) / 2 * 0.6,
                startAngle: (180+angle) * Math.PI / 180,
                endAngle: (270+angle) * Math.PI / 180
              },
              style: {
                stroke: "#0CD3DB",
                fill: "transparent",
                lineWidth: 1.5
              },
              silent: true
            };
          },
          data: [0]
        }, {
          name: "ring5",
          type: 'custom',
          coordinateSystem: "none",
          renderItem: function(params, api) {
            return {
              type: 'arc',
              shape: {
                cx: api.getWidth() / 2,
                cy: api.getHeight() / 2,
                r: Math.min(api.getWidth(), api.getHeight()) / 2 * 0.65,
                startAngle: (270+-angle) * Math.PI / 180,
                endAngle: (40+-angle) * Math.PI / 180
              },
              style: {
                stroke: "#0CD3DB",
                fill: "transparent",
                lineWidth: 1.5
              },
              silent: true
            };
          },
          data: [0]
        }, {
          name: "ring5",
          type: 'custom',
          coordinateSystem: "none",
          renderItem: function(params, api) {
            return {
              type: 'arc',
              shape: {
                cx: api.getWidth() / 2,
                cy: api.getHeight() / 2,
                r: Math.min(api.getWidth(), api.getHeight()) / 2 * 0.65,
                startAngle: (90+-angle) * Math.PI / 180,
                endAngle: (220+-angle) * Math.PI / 180
              },
              style: {
                stroke: "#0CD3DB",
                fill: "transparent",
                lineWidth: 1.5
              },
              silent: true
            };
          },
          data: [0]
        }, {
          name: "ring5",
          type: 'custom',
          coordinateSystem: "none",
          renderItem: function(params, api) {
            let x0 = api.getWidth() / 2;
            let y0 = api.getHeight() / 2;
            let r = Math.min(api.getWidth(), api.getHeight()) / 2 * 0.65;
            let point = getCirlPoint(x0, y0, r, (90+-angle))
            return {
              type: 'circle',
              shape: {
                cx: point.x,
                cy: point.y,
                r: 4
              },
              style: {
                stroke: "#0CD3DB",//粉
                fill: "#0CD3DB"
              },
              silent: true
            };
          },
          data: [0]
        }, {
          name: "ring5",  //绿点
          type: 'custom',
          coordinateSystem: "none",
          renderItem: function(params, api) {
            let x0 = api.getWidth() / 2;
            let y0 = api.getHeight() / 2;
            let r = Math.min(api.getWidth(), api.getHeight()) / 2 * 0.65;
            let point = getCirlPoint(x0, y0, r, (270+-angle))
            return {
              type: 'circle',
              shape: {
                cx: point.x,
                cy: point.y,
                r: 4
              },
              style: {
                stroke: "#0CD3DB",      //绿
                fill: "#0CD3DB"
              },
              silent: true
            };
          },
          data: [0]
        }, {
          name: '',
          type: 'pie',
          radius: ['58%', '45%'],
          silent: true,
          clockwise: true,
          startAngle: 90,
          z: 0,
          zlevel: 0,
          label: {
            normal: {
              position: "center",

            }
          },
          data: [{
            value: value,
            name: "",
            itemStyle: {
              normal: {
                color: { // 完成的圆环的颜色
                  colorStops: [{
                    offset: 0,
                    color: '#4FADFD' // 0% 处的颜色
                  }, {
                    offset: 1,
                    color: '#28E8FA' // 100% 处的颜色
                  }]
                },
              }
            }
          },
            {
              value: 100-value,
              name: "",
              label: {
                normal: {
                  show: false
                }
              },
              itemStyle: {
                normal: {
                  color: "#173164"
                }
              }
            }
          ]
        },

          {
            name: "",
            type: "gauge",
            radius: "58%",
            center: ['50%', '50%'],
            startAngle: 0,
            endAngle: 359.9,
            splitNumber: 8,
            hoverAnimation: true,
            axisTick: {
              show: false
            },
            splitLine: {
              length: 60,
              lineStyle: {
                width: 5,
                color: "#061740"
              }
            },
            axisLabel: {
              show: false
            },
            pointer: {
              show: false
            },
            axisLine: {
              lineStyle: {
                opacity: 0
              }
            },
            detail: {
              show: false
            },
            data: [{
              value: 0,
              name: ""
            }]
          },

        ]
      };

//获取圆上面某点的坐标(x0,y0表示坐标，r半径，angle角度)
      function getCirlPoint(x0, y0, r, angle) {
        let x1 = x0 + r * Math.cos(angle * Math.PI / 180)
        let y1 = y0 + r * Math.sin(angle * Math.PI / 180)
        return {
          x: x1,
          y: y1
        }
      }

      function draw(){
        angle = angle+3
        myChart.setOption(option, true)
        //window.requestAnimationFrame(draw);
      }

      setInterval(function() {
        //用setInterval做动画感觉有问题
        draw()
      }, 100);

      myChart.setOption(option)
    }
  },
  mounted() {
    this.initEcharts()
  }
}
</script>

<style scoped>

</style>
